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/**
* mds — A micro-display server
* Copyright © 2014, 2015, 2016 Mattias Andrée (maandree@member.fsf.org)
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef MDS_LIBMDSSERVER_HASH_HELP_H
#define MDS_LIBMDSSERVER_HASH_HELP_H
#include <stdlib.h>
#include <string.h>
/**
* Calculate the hash of a string
*
* @param str The string
* @return The hash of the string
*/
__attribute__((pure))
static inline size_t string_hash(const char* str)
{
size_t hash = 0;
if (str != NULL)
while (*str != '\0')
hash = hash * 31 + (size_t)(unsigned char)*str++;
return hash;
}
/**
* Check whether two `char*`:s are of equal value
*
* @param str_a The first string
* @param str_b The second string
* @return Whether the strings are equals
*/
__attribute__((pure))
static inline int string_comparator(char* str_a, char* str_b)
{
if ((str_a != NULL) && (str_b != NULL) && (str_a != str_b))
return !strcmp((char*)str_a, (char*)str_b);
else
return str_a == str_b;
}
#endif
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